Lakes / Iowa / Calhoun County / South Twin Lake
South Twin Lake, Iowa
465 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Iowa
42.46 degrees N, 94.65 degrees W - Calhoun County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How South Twin Lake Stacks Up
- Larger than 87% of the 220 lakes counted in Iowa.
- The largest lake in Calhoun County among those counted.
- About 69 miles from Okoboji, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| North Twin Lake | Calhoun | 2.0 mi | 452 acres |
| Lizard Lake | Pocahontas | 17 mi | 274 acres |
| Sunken Island Lake | Pocahontas | 17 mi | 135 acres |
| Artesian Lake | Carroll | 21 mi | 25 acres |
| Black Hawk Lake | Sac | 22 mi | 914 acres |
| Clear Lake | Pocahontas | 23 mi | 163 acres |
Straight-line distance between lake centers.
Facts and Figures
Largest Lakes in Iowa
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Rathbun Lake | Appanoose | 13,869 acres | - |
| 2 | Lake Red Rock | Marion | 8,619 acres | - |
| 3 | Spirit Lake | Dickinson | 5,463 acres | - |
| 4 | Saylorville Lake | Polk | 5,428 acres | - |
| 5 | Clear Lake | Cerro Gordo | 3,632 acres | - |
All 220 Iowa lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 137044220). Verified October 30, 2026.